<template>
  <div class="container">
    <div class="left-board">
      <div class="logo-wrapper">
        <div class="logo">
          <img :src="logo" alt="logo" class="logo_img" />
          <!-- <a class="github" href="https://github.com/JakHuang/form-generator" target="_blank">
            <img src="https://github.githubassets.com/pinned-octocat.svg" alt>
          </a> -->
        </div>
      </div>
      <el-scrollbar class="left-scrollbar">
        <div class="components-list">
          <div v-for="(item, listIndex) in leftComponents" :key="listIndex">
            <div class="components-title">
              <svg-icon icon-class="component" />
              {{ item.title }}
            </div>
            <draggable
              class="components-draggable"
              :list="item.list"
              :group="{ name: 'componentsGroup', pull: 'clone', put: false }"
              :clone="cloneComponent"
              draggable=".components-item"
              :sort="false"
              @end="onEnd"
            >
              <div
                v-for="(element, index) in item.list"
                :key="index"
                class="components-item"
                @click="addComponent(element)"
              >
                <div class="components-body">
                  <svg-icon :icon-class="element.__config__.tagIcon" />
                  {{ element.__config__.label }}
                </div>
              </div>
            </draggable>
          </div>
        </div>
      </el-scrollbar>
    </div>

    <div class="center-board">
      <div class="action-bar">
        <!-- 修改之后的业务逻辑 -->
        <el-dropdown @command="handleCommand" style="margin:0px 0px 0px 15px" >
          <span class="el-dropdown-link">
            VK框架功能<i class="el-icon-arrow-down el-icon--right"></i>
          </span>
          <template #dropdown>
            <el-dropdown-menu>
              <!-- <el-dropdown-item :command="1" icon="el-icon-view" >查看JSON</el-dropdown-item> -->
              <el-dropdown-item :command="3" icon="el-icon-view" >查看VK框架JSON</el-dropdown-item>
              <el-dropdown-item :command="4" icon="el-icon-edit-outline" >复制VK框架代码</el-dropdown-item>
            </el-dropdown-menu>
          </template>
        </el-dropdown>

         <el-dropdown @command="handleCommand" style="margin:0px 15px" >
          <span class="el-dropdown-link">
            Ele原生功能<i class="el-icon-arrow-down el-icon--right"></i>
          </span>
          <template #dropdown>
            <el-dropdown-menu>
              <!-- <el-button icon="el-icon-video-play" type="text" @click="run">
              运行
            </el-button> -->
              <el-dropdown-item :command="0" icon="el-icon-video-play" >运行</el-dropdown-item>
              <el-dropdown-item :command="1" icon="el-icon-download" >导出vue文件</el-dropdown-item>
              <el-dropdown-item :command="2" icon="el-icon-edit-outline" >复制原生代码</el-dropdown-item>
            </el-dropdown-menu>
          </template>
        </el-dropdown>

        <el-button
          class="delete-btn"
          icon="el-icon-delete"
          type="text"
          @click="empty"
        >
          清空
        </el-button>
      </div>
      <el-scrollbar class="center-scrollbar">
        <el-row class="center-board-row" :gutter="formConf.gutter">
          <el-form
            :size="formConf.size"
            :label-position="formConf.labelPosition"
            :disabled="formConf.disabled"
            :label-width="formConf.labelWidth + 'px'"
          >
            <draggable
              class="drawing-board"
              :list="drawingList"
              :animation="340"
              group="componentsGroup"
            >
              <draggable-item
                v-for="(item, index) in drawingList"
                :key="item.renderKey"
                :drawing-list="drawingList"
                :current-item="item"
                :index="index"
                :active-id="activeId"
                :form-conf="formConf"
                @activeItem="activeFormItem"
                @copyItem="drawingItemCopy"
                @deleteItem="drawingItemDelete"
              />
            </draggable>
            <div v-show="!drawingList.length" class="empty-info">
              从左侧拖入或点选组件进行表单设计
            </div>
          </el-form>
        </el-row>
      </el-scrollbar>
    </div>

    <right-panel
      :active-data="activeData"
      :form-conf="formConf"
      :show-field="!!drawingList.length"
      @tag-change="tagChange"
      @fetch-data="fetchData"
    />

    <form-drawer
      :visible.sync="drawerVisible"
      :form-data="formData"
      size="100%"
      :generate-conf="generateConf"
    />
    <json-drawer
      size="60%"
      :visible.sync="jsonDrawerVisible"
      :json-str="JSON.stringify(formData)"
      @refresh="refreshJson"
    />
    <code-type-dialog
      :visible.sync="dialogVisible"
      title="选择生成类型"
      :show-file-name="showFileName"
      @confirm="generate"
    />
    <input id="copyNode" type="hidden" />
  </div>
</template>

<script>
import draggable from "vuedraggable";
import { debounce } from "throttle-debounce";
import { saveAs } from "file-saver";
import ClipboardJS from "clipboard";
import render from "@/components/render/render";
import FormDrawer from "./FormDrawer";
import JsonDrawer from "./JsonDrawer";
import RightPanel from "./RightPanel";
import {
  inputComponents,
  selectComponents,
  layoutComponents,
  vkComponents,
  formConf
} from "@/components/generator/config";
import {
  exportDefault,
  beautifierConf,
  isNumberStr,
  titleCase,
  deepClone,
  isObjectObject
} from "@/utils/index";
import {
  makeUpHtml,
  vueTemplate,
  vueScript,
  cssStyle
} from "@/components/generator/html";
import { makeUpJs } from "@/components/generator/js";
import { makeUpCss } from "@/components/generator/css";
import drawingDefalut from "@/components/generator/drawingDefalut";
import logo from "@/assets/logo.png";
import CodeTypeDialog from "./CodeTypeDialog";
import DraggableItem from "./DraggableItem";
import Fromdata from "../../utils/createdata"
import {
  getDrawingList,
  saveDrawingList,
  getIdGlobal,
  saveIdGlobal,
  getFormConf
} from "@/utils/db";
import loadBeautifier from "@/utils/loadBeautifier";

let beautifier;
const emptyActiveData = { style: {}, autosize: {} };
let oldActiveId;
let tempActiveData;
const drawingListInDB = getDrawingList();
const formConfInDB = getFormConf();
const idGlobal = getIdGlobal();

export default {
  components: {
    draggable,
    render,
    FormDrawer,
    JsonDrawer,
    RightPanel,
    CodeTypeDialog,
    DraggableItem
  },
  data() {
    return {
      logo,
      idGlobal,
      formConf,
      inputComponents,
      selectComponents,
      layoutComponents,
      vkComponents,
      labelWidth: 100,
      drawingList: drawingDefalut,
      drawingData: {},
      activeId: drawingDefalut[0].formId,
      drawerVisible: false,
      formData: {},
      dialogVisible: false,
      jsonDrawerVisible: false,
      generateConf: null,
      showFileName: false,
      Vkcz: true, //vk类型的导出文件
      activeData: drawingDefalut[0],
      saveDrawingListDebounce: debounce(340, saveDrawingList),
      saveIdGlobalDebounce: debounce(340, saveIdGlobal),
      leftComponents: [
        {
          title: "输入型组件",
          list: inputComponents
        },
        {
          title: "选择型组件",
          list: selectComponents
        },
        {
          title: "布局型组件",
          list: layoutComponents
        },
        {
          title: "VK框架内置组件",
          list: vkComponents
        }
      ]
    };
  },
  computed: {},
  watch: {
    // eslint-disable-next-line func-names
    "activeData.__config__.label": function(val, oldVal) {
      if (
        this.activeData.placeholder === undefined ||
        !this.activeData.__config__.tag ||
        oldActiveId !== this.activeId
      ) {
        return;
      }
      this.activeData.placeholder =
        this.activeData.placeholder.replace(oldVal, "") + val;
    },
    activeId: {
      handler(val) {
        oldActiveId = val;
      },
      immediate: true
    },
    drawingList: {
      handler(val) {
        this.saveDrawingListDebounce(val);
        if (val.length === 0) this.idGlobal = 100;
      },
      deep: true
    },
    idGlobal: {
      handler(val) {
        this.saveIdGlobalDebounce(val);
      },
      immediate: true
    }
  },
  mounted() {
    if (Array.isArray(drawingListInDB) && drawingListInDB.length > 0) {
      this.drawingList = drawingListInDB;
    } else {
      this.drawingList = drawingDefalut;
    }
    this.activeFormItem(this.drawingList[0]);
    if (formConfInDB) {
      this.formConf = formConfInDB;
    }
    loadBeautifier(btf => {
      beautifier = btf;
    });
    const clipboard = new ClipboardJS("#copyNode", {
      text: trigger => {
        const codeStr = this.generateCode();
        this.$notify({
          title: "成功",
          message: "代码已复制到剪切板，可粘贴。",
          type: "success"
        });
        return codeStr;
      }
    });
    clipboard.on("error", e => {
      this.$message.error("代码复制失败");
    });
  },
  methods: {
    setObjectValueReduce(obj, strKeys, data) {
      const arr = strKeys.split(".");
      arr.reduce((pre, item, i) => {
        if (arr.length === i + 1) {
          pre[item] = data;
        } else if (!isObjectObject(pre[item])) {
          pre[item] = {};
        }
        return pre[item];
      }, obj);
    },
    setRespData(component, resp) {
      const { dataPath, renderKey, dataConsumer } = component.__config__;
      if (!dataPath || !dataConsumer) return;
      const respData = dataPath
        .split(".")
        .reduce((pre, item) => pre[item], resp);

      // 将请求回来的数据，赋值到指定属性。
      // 以el-tabel为例，根据Element文档，应该将数据赋值给el-tabel的data属性，所以dataConsumer的值应为'data';
      // 此时赋值代码可写成 component[dataConsumer] = respData；
      // 但为支持更深层级的赋值（如：dataConsumer的值为'options.data'）,使用setObjectValueReduce
      this.setObjectValueReduce(component, dataConsumer, respData);
      const i = this.drawingList.findIndex(
        item => item.__config__.renderKey === renderKey
      );
      if (i > -1) this.$set(this.drawingList, i, component);
    },
    fetchData(component) {
      const { dataType, method, url } = component.__config__;
      if (dataType === "dynamic" && method && url) {
        this.setLoading(component, true);
        this.$axios({
          method,
          url
        }).then(resp => {
          this.setLoading(component, false);
          this.setRespData(component, resp.data);
        });
      }
    },
    setLoading(component, val) {
      const { directives } = component;
      if (Array.isArray(directives)) {
        const t = directives.find(d => d.name === "loading");
        if (t) t.value = val;
      }
    },
    activeFormItem(currentItem) {
      this.activeData = currentItem;
      this.activeId = currentItem.__config__.formId;
    },
    onEnd(obj) {
      if (obj.from !== obj.to) {
        this.fetchData(tempActiveData);
        this.activeData = tempActiveData;
        this.activeId = this.idGlobal;
      }
    },
    addComponent(item) {
      const clone = this.cloneComponent(item);
      this.fetchData(clone);
      this.drawingList.push(clone);
      this.activeFormItem(clone);
    },
    cloneComponent(origin) {
      const clone = deepClone(origin);
      const config = clone.__config__;
      config.span = this.formConf.span; // 生成代码时，会根据span做精简判断
      this.createIdAndKey(clone);
      clone.placeholder !== undefined && (clone.placeholder += config.label);
      tempActiveData = clone;
      return tempActiveData;
    },
    createIdAndKey(item) {
      const config = item.__config__;
      config.formId = ++this.idGlobal;
      config.renderKey = `${config.formId}${+new Date()}`; // 改变renderKey后可以实现强制更新组件
      if (config.layout === "colFormItem") {
        item.__vModel__ = `field${this.idGlobal}`;
      } else if (config.layout === "rowFormItem") {
        config.componentName = `row${this.idGlobal}`;
        !Array.isArray(config.children) && (config.children = []);
        delete config.label; // rowFormItem无需配置label属性
      }
      if (Array.isArray(config.children)) {
        config.children = config.children.map(childItem =>
          this.createIdAndKey(childItem)
        );
      }
      return item;
    },
    AssembleFormData() {
      this.formData = {
        fields: deepClone(this.drawingList),
        ...this.formConf
      };
    },
    new_AssembleFormData() {
      this.formData=Fromdata(this.drawingList,'normal',this.formData,this.formConf)
    },
    new_showJson() {
      this.new_AssembleFormData();
      this.jsonDrawerVisible = true;
    },
    generate(data) {
      const func = this[`exec${titleCase(this.operationType)}`];
      // 从这个地方拿了对应的数据,然后进行一个操作
      this.generateConf = data;
      func && func(data);
    },
    execRun(data) {
      this.AssembleFormData();
      this.drawerVisible = true;
    },
    execDownload(data) {
      const codeStr = this.generateCode();
      const blob = new Blob([codeStr], { type: "text/plain;charset=utf-8" });
      saveAs(blob, data.fileName);
    },
    execCopy(data) {
      document.getElementById("copyNode").click();
    },
    empty() {
      this.$confirm("确定要清空所有组件吗？", "提示", { type: "warning" }).then(
        () => {
          this.drawingList = [];
          this.idGlobal = 100;
        }
      );
    },
    drawingItemCopy(item, list) {
      let clone = deepClone(item);
      clone = this.createIdAndKey(clone);
      list.push(clone);
      this.activeFormItem(clone);
    },
    drawingItemDelete(index, list) {
      list.splice(index, 1);
      this.$nextTick(() => {
        const len = this.drawingList.length;
        if (len) {
          this.activeFormItem(this.drawingList[len - 1]);
        }
      });
    },
    generateCode() {
      // vk vue文件
      var { type } = this.generateConf;
      if (this.Vkcz === true && type == "file") {
        // 这个时候是特殊操作,导出的是VKvue文件
        this.AssembleFormData();
        const css = cssStyle(makeUpCss(this.formData));
        return beautifier.html(Fromdata(this.drawingList,'vkformpage',this.formData,this.formConf)  + Fromdata(this.drawingList,'all',this.formData,this.formConf) + css, beautifierConf.html);
      } else if (this.Vkcz === true && type == "dialog") {
        type = "vk";
        this.AssembleFormData();
        const css = cssStyle(makeUpCss(this.formData));
        return beautifier.html(Fromdata(this.drawingList,'vkdialog',this.formData,this.formConf) + Fromdata(this.drawingList,'all',this.formData,this.formConf) + css, beautifierConf.html);
      } else {
        // 这个时候是特殊操作,导出的是普通vue文件
        this.AssembleFormData();
        const script = vueScript(makeUpJs(this.formData, type));
        const html = vueTemplate(makeUpHtml(this.formData, type));
        const css = cssStyle(makeUpCss(this.formData));
        return beautifier.html(html + script + css, beautifierConf.html);
      }
    },
    showJson() {
      this.AssembleFormData();
      this.jsonDrawerVisible = true;
    },
    download() {
      this.dialogVisible = true;
      this.showFileName = true;
      this.operationType = "download";
      this.Vkcz = false;
    },
    vkdownload() {
      this.dialogVisible = true;
      this.showFileName = false;
      this.operationType = "copy";
      this.Vkcz = true;
    },
    run() {
      this.dialogVisible = true;
      this.showFileName = false;
      this.operationType = "run";
      this.Vkcz = false;
    },
    copy() {
      this.dialogVisible = true;
      this.showFileName = false;
      this.operationType = "copy";
      this.Vkcz = false;
    },
    tagChange(newTag) {
      newTag = this.cloneComponent(newTag);
      const config = newTag.__config__;
      newTag.__vModel__ = this.activeData.__vModel__;
      config.formId = this.activeId;
      config.span = this.activeData.__config__.span;
      this.activeData.__config__.tag = config.tag;
      this.activeData.__config__.tagIcon = config.tagIcon;
      this.activeData.__config__.document = config.document;
      if (
        typeof this.activeData.__config__.defaultValue ===
        typeof config.defaultValue
      ) {
        config.defaultValue = this.activeData.__config__.defaultValue;
      }
      Object.keys(newTag).forEach(key => {
        if (this.activeData[key] !== undefined) {
          newTag[key] = this.activeData[key];
        }
      });
      this.activeData = newTag;
      this.updateDrawingList(newTag, this.drawingList);
    },
    updateDrawingList(newTag, list) {
      const index = list.findIndex(
        item => item.__config__.formId === this.activeId
      );
      if (index > -1) {
        list.splice(index, 1, newTag);
      } else {
        list.forEach(item => {
          if (Array.isArray(item.__config__.children))
            this.updateDrawingList(newTag, item.__config__.children);
        });
      }
    },
    refreshJson(data) {
      this.drawingList = deepClone(data.fields);
      delete data.fields;
      this.formConf = data;
    },
    // 多选的事件
    handleCommand(value) {
     console.log(this.drawingList,'原生数据',this.formConf,'表单配置')
        switch(value){
          case 0: this.run();break;
          case 1: this.download();break;  //原生导出vue页面
          case 2: this.copy();break;      //复制原生代码
          case 3: this.new_showJson();break;
          case 4: this.vkdownload();break;
          default : break;
        }
    }
  }
};
</script>

<style lang="scss">
@import "@/styles/home";
 .el-dropdown-link {
    cursor: pointer;
    color: #409EFF;
  }
  .el-icon-arrow-down {
    font-size: 12px;
  }
  .demonstration {
    display: block;
    color: #8492a6;
    font-size: 14px;
    margin-bottom: 20px;
  }
</style>
